Gas shelf life

['68OrangeSunshine]

Originally Posted by KQQL IT

Why because Ethanol eats rubber parts ?
My quadrahet get used daily ish and still needs an accelerator pump every 6 months

Before Ethanol. On my '68 C/10's 292 L6, It was rigged with a Holley 4160 R8007 -- 390 CFM 4Bbl/ Offy Intake/ and Clifford Long Tube headers. I remember how every backfire cost me $5.95 for a 8.5Hg new power valve, and I had to get some member of the Holley tribe to guide me thru the mysteries of carburation. You couldn't just slap a new part in, you had to retune.I found I'm a klutz around swiss watches and found a less complicated system with the Carter AFB. I found them idiotproof.
There was a quadrajet on my '71 GMC Jimmy. When I bought it PO had replaced the stolen OEM 350 with a Goodwrench 305. Unfamuliar with the breed, I turned in the Original as a core to Checker Auto, got a generic repop and got limited results.
At one point I had a Holley 780 CFM DoublePumper on that SBC. I also tried 100 Octane Race Gas. I didn't get to experiment with it much because, coincidently, the engine Sucked Valves on both #6 and #7 cylinders. And I had to sideline the Rig.
When I rerigged that Jimmy, I got a Mr. Goodwrench 350/Weiand intake, Heddmam Hedders, Carter AFB, 600 CFM 9635S/ HEI.
It's been running OK for about 26 years. I can't recall the total mileage.
You must have a more aggressive alcohol in the pump gas mix in Cal. I've noticed more Fuel Pump failures due to agressive fuel solvents in AZ, but not so much carb distress.